internal static IAeadCipherBuilder <IParameters <Algorithm> > CreateAeadDecryptorBuilder(AlgorithmIdentifier encScheme, byte[] derivedKey, IParameters <Algorithm> parameters) { DerObjectIdentifier encSchemeAlg = encScheme.Algorithm; if (encSchemeAlg.On(NistObjectIdentifiers.Aes)) { IAeadBlockCipherService service = CryptoServicesRegistrar.CreateService(new FipsAes.Key(derivedKey)); if (encSchemeAlg.Equals(NistObjectIdentifiers.IdAes128Ccm) || encSchemeAlg.Equals(NistObjectIdentifiers.IdAes192Ccm) || encSchemeAlg.Equals(NistObjectIdentifiers.IdAes256Ccm)) { return(service.CreateAeadDecryptorBuilder((FipsAes.AuthenticationParametersWithIV)parameters)); } if (encSchemeAlg.Equals(NistObjectIdentifiers.IdAes128Gcm) || encSchemeAlg.Equals(NistObjectIdentifiers.IdAes192Gcm) || encSchemeAlg.Equals(NistObjectIdentifiers.IdAes256Gcm)) { return(service.CreateAeadDecryptorBuilder((FipsAes.AuthenticationParametersWithIV)parameters)); } } throw new ArgumentException("cannot match decryption algorithm"); }